Understanding RAID Systems: A Comprehensive Guide to RAID 0, 1, 5, 6, and JBOD
A RAID (Redundant Array of Independent Disks) system is a storage virtualization technology that combines multiple physical disks (SATA, SCSI, SAS, or SSD) into a single logical volume, simultaneously providing data protection and performance optimization. It is one of the most cost-effective solutions for securing your data in a professional or home environment.
Depending on the RAID level chosen, this technology allows you to tolerate the failure of one or more disks without data loss. The most common levels—RAID 0, RAID 1, RAID 5, and RAID 6—meet different needs in terms of capacity, speed, and redundancy.
Key point: A RAID system does not replace a backup. It protects against hardware failure, but not against accidental deletion, ransomware, or physical disasters.